[Code of Federal Regulations] [Title 49, Volume 2] [Revised as of October 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR173.121] [Page 477-478] TITLE 49--TRANSPORTATION CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 173--SHIPPERS--GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS--Table of Contents Subpart D--Definitions Classification, Packing Group Assignments and Exceptions for Hazardous Materials Other Than Class 1 and Class 7 Sec. 173.121 Class 3--Assignment of packing group. (a) The packing group of a Class 3 material is as assigned in column 5 of the Sec. 172.101 table. When the Sec. 172.101 table provides more than one packing group for a hazardous material, the packing group shall be determined by applying the following criteria: ---------------------------------------------------------------------------------------------------------------- Packing group Flash point (closed-cup) Initial boiling point ---------------------------------------------------------------------------------------------------------------- I..................................... ..................................... [le]35 deg.C (95 deg.F) II.................................... <23 deg.C (73 deg.F)................. 35 deg.C (95 deg.F) III................................... [ge]23 deg.C, [le]60.5 deg.C ([ge]73 35 deg.C (95 deg.F) deg.F, [le]141 deg.F). ---------------------------------------------------------------------------------------------------------------- [[Page 478]] (b) Criteria for inclusion of viscous Class 3 materials in Packing Group III. (1) Viscous Class 3 materials in Packing Group II with a flash point of less than 23 deg.C (73 deg.F) may be grouped in Packing Group III provided that-- (i) Less than 3 percent of the clear solvent layer separates in the solvent separation test; (ii) The mixture does not contain any substances with a primary or a subsidiary risk of Division 6.1 or Class 8; (iii) The capacity of the packaging is not more than 30 L (7.9 gallons); and (iv) The viscosity and flash point are in accordance with the following table: ------------------------------------------------------------------------ Jet Flow time t in seconds diameter Flash point c.c. in mm ------------------------------------------------------------------------ 20